Grinding-mill.



S- SNYDER.

GRINDING MILL. APPLFCATION FILED SEPT. 13. I913. 1 15.} U3 Patented July 13, 1915.

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S. SNYDER. GRINDING MILL. APPLICATION nuzn SEPT. I3, 1913.

hmfimw, Patented July 13, 1915.

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as an o SIMON SNYDER, OF MUNC'Y, PENNSYLVANIA, ASSIGNOR TO SPROUT, WALDRON 86 COMPANY, OF MUNCY, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

GRINDING-MILL.

Application filed September 13, 1913.

. and useful Improvements in Grinding- Mills; and I hereby declarethat the follow' ing is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.

This invention is a novel improvement in grinding mills, of that class commonly called attrition mills, in which the grinding is effected by means of two. opposed circular disks mounted face to face on independ ent axially alined shafts rotating in opposite directions. 1

The objects of the present invention are:

First, to so construct the base of the mill that the shafts of the disks may be kept in absolutely accurate alinement, and for this purpose the base frame of the machine is cast with integral standards which rise approximately to the axial line of the shafts, and on which the journal boxes for the shafts are directly secured, doing away with any adjustable or detachable standards on the base for supporting the journal boxes and greatly simplifying and economizing the construction while enhancing the durability and efficiency of the machine.

Second, to have one of the disk carrying shafts and its journal boxes bodily adjusted longitudinally of the shaft to enable the disks to be separated axially, so that the grinding surfaces of the disks may be re paired when necessary without having to dismount the disks from their shafts or the shafts from their bearings, and Without disturbing the adjustment of the grinding regulating devices. In this construction the devices for regulating the grinding adjustment of the disks are movable with the bearings and the adjustment of such devices does not have to be disturbed by the said separating movement of thedisks.

Third, to provide a novel sealing ring to seal the grinding case around the feed opening and shaft so that material cannot pass through the grinding case without being subjected to the grinding action of the disks. j

I will explain the invention more in detail with reference to the accompanying draw+ Specification of Letters Patent.

Patented July 13, 1915.

Serial No. 789,699.

ings which show one practical embodiment of the'invention, and-refer to the claims for concise summaries of the invention and features thereof for tection.

Insaid drawings-Figure 1 is a side elevation of the mill. Fig. 2 is a top plan View of the base frame detached. Fig. 3 is an enlarged detail longitudinal vertical section through part of the mill showing the means for. bodily adjusting the bearings of one of the shafts, with the shaft and grinding disk thereon, longitudinally of the base; and also showing such parts in working position in full lines; and in retracted position in dotted lines. Fig. 4 is a transverse section on line 4-4, Fig. 3, showing the seal-. ing ring. Fig. 5 is an enlarged detail section on line 55, Fig. 4. Fig. 6 is a detail section on line 66, Fig. 3. z

The base of the mill is preferably rectangular in form and is composed of a base frame 1 from which rise four integral transversely disposed standards 1, 1 1, 1 which are substantially alike, except standwhich. I desire pro ards 1, 1 are preferably longer, longitudinally of the base, than the other standards.

Intermediate the standards 1, 1 is an open ing 1, and intermediate the standards 1 n I n u a 7 1, is an openingl g whlch openlng might be covered if desired.

Intermediate and connecting the standards 1", 1 is an integral bowl-like portion I right hand shaft 3 carries the grinding disk 3 on its inner end, and 'isjournaled in boxes 3", 3 respectively mounted on the standards Preferably as shown in Fig. 6 the journal boxes 2', 2, 3", 3 are polygon-ally shaped on their lower sides, in cross section and fitted in correspondingly shaped longitudinal recesses in the upper ends'oftheir respective atandardsfso that when the bearings are in The left handshaft 2 carat i 5 -the standards 1, 1

the inner end of of the from a hopper 4 of are shown as provided place on said standards they are held firmly against lateral displacement.

he bearings 2 2 may be secured in place on their respective standards by means 2 tapped through lateral ears on and engaging threaded apertures projections 1, 1 on the sides of as shown. 3", 3? are similarly fitted on the standards 1, 1 and may be secured when the disks are in operative position by means of bolts 3", 3 tapped into threaded openings in lateral projections 1 1 on the standards 1' 1.

the boxes in lateral As shown the shafts 2 and 3 are preferably mounted in ball hearings in their respective journal boxes as indicated in the drawings, such ball bearings however form .no part of the present invention and may be of any suitable construction.

The disks 2, 3 are inclosed within a grinding case or housing, the lower part of which is formed by the part 1' of the base as above described, and the upper part of which is formed by a shell or casing 4, the lower part of which corresponds in contour to the upper end of the part 1 of the base, and the casing 4 is fitted on this part 1*; said parts have meeting flanges 4", 1 and may be fixedly secured together by bolts transfixing said flanges, or in any other desired manner.

The casing 4 has a at one side which opening 4: in the wall ofthe ease around shaft 2, and the hub of the grinding disk 2 is provided with radial openings or eyes 2" for the passage of the grain as usual. The particular construction of the grinding disks 2, 3 is not a. feature present invention; any suitable kind may be employed, but that on shaft'2 should have an eye or eyes for the passage of the chute or fixed spout 4 grain from the spout 4 to and between the may receive the grain; any suitable construc casing 4, and provided disks. The spout, 4

tion mounted on the with any suitable feeding devices.

The shafts 2 and 3 may be rotated in opposite directions by any suitable means, and with pulleys 2 3* which may be belted to drivers, not shown.

The journal box 3 is preferably formed with a plate 3 on its inner end which is adapted to fit in and close a corresponding opening 4in theadjacent side of the grindmg case, which opening is provided to permit ,the hub of the disk 3" to project. through the side Wall of the housing when the grinding disk 3 is separated from the disk 2", as herei nafter described, to renew or repair the grinding faces of the disks. When.the

isks are in normal Working position the plate 3' tightly closes said opening.

The journal. boxes 3 and 3 are both The boxes ,disk 3 and the bearing 3") discharges through an fastened in place slidable longitudinally on their standards 1, 1, and the box 3 is preferably provided on its under side with a rack, as 3- which is adapted to engage a pinion 5 on a countershaft 5 journaled in suitable hearings in the standard 1. The outer end of this shaft 5 may be squared, as at 5, for the engagement of a crank or wrench by which said shaft can be turned when it is desired to shift the box 3"; but before this box can be moved it is necessary that the bolts 3*, 3' be removed. When these bolts are removed by rotating shaft 5 the box 3" can be moved longitudinally and with it the box 3, shaft 3, runner 3 and pulley 3, are all moved longitudinally of the'base to the position indicated in dotted lines in Fig.

In order to cause the shaft 3 to move longitudinally with the box 3 the ball bearing 3 on which this shaft is mounted in box 3" is rigidly confined against longitudinal movement relative to the shaft between a sleeve 3 (strung on the shaft between the hub of and a nut or collar 3" on the opposite side of the bearing 3. The shaft 3 is rotatably but normally longitudinally immovably mounted in box 3 by having the ball bearing 13 on which it is mounted in said box confined between a collar 13 and a disk 13" in the box. The collar 13 is normally forced outward by a spring 13 and disk 13" forms part of the end thrust bearings for shaft 3. The construction is such that when the box 3" is moved longitudinally it will move shaft 3, box 3, and all the connected parts, longitudinally of the base with it.

In the box 3 are mounted end thrust bearings 3 for the shaft 3, and devices 3 for adjusting the grinding position of this shaft, but such adjusting devices are not claimed herein and are simply illustrated t0 showthat the separation of the grinding disks, as indicated in dotted lines in Fig. 3, does not disturb the adjustment of the grind.- ing regulating devices, and when the shaft and parts are returned to the position shown in full lines in Fig. 3, and the boxes 3", 3 by bolts 3*, 3, the machine is again ready for operation.

When the parts are retracted to the position shown in dotted lines in Fig. 3 the grinding faces of the disks 2, 3 can be inspected and the grinding surfaces 2, 3 thereof can be removed and replaced through openings in the housing, which openings are normally closed by suitable plates 4: when the mill is in operation. Thus whenever it is desired to repair, remove, or renew the grinding surfaces-2 it is not necessary ithat the mill be dismantled; and this saves time and labor in the maintenance of such mill.

It is important in the practical operation of these machines that all the grain fed from the hopper be compelled to pass through the eyes 2 of the grinding disk 2 in order that it shall pass between the grinding surfaces 2, 3 whereby it is reduced before it can' surrounding opening 4*, I attach a sealing ring which is composed of preferablyfour or more segmental sections 7, the ends of which overlap as shown at 7 so as to permit expansion or contraction of the ring by radially adjusting said sections. These sections surround the flange 6 and are adjust able so as to be closely fitted to the exterior face of said flange. To support the sealing ring adjustably in the casing and around the ring 6, I preferably provide each ring section with two or more openings 7 b which are engaged by studs 8 projecting eccentrically from the ends, of bolts 8, through openings in the adjacent wall of the housing, which bolts are provided with jam-nuts 8 by which they can be locked when adjusted. By turning bolts 8 the ring sections 7 can be moved radially,in or out, by reason of the engagement of openings 7 with eccentric studs 8", and when properly adjusted can be fastened in position by tightening the jam-nuts 8. tightly against the wall of the housing by means of nuts 8 on the ends of the studs v8", which are threaded for engagement of these nuts, see Fig. 5. By this means a close adjustable seal is made between the runner or disk 2 and the wall of the housing or grinding chamber, and leakage of grain past the grinding disks is prevented.

'What I claim is:

1. In a grinding mill the combination of oppositely disposed grinding disks, a housing in which said disks are mounted, a feed spout for supplying feed to said disks communicating with said housing through an opening adjacent the eye of one of the disks, an annular flange on said disk adjacent said opening, a sectional sealing ring surrounding said flange, eccentric bolts engaging openingsin said sections for. adjusting them, and means for clamping the sections when adjusted.

2. In a grinding mill the combination of oppositely disposed, disks, a housing. in which said disks are mounted, a feed spout for supplying feed to said disks communicating with said housing through an opening adjacent the eye of one of the disks, an annularfiange on said disk adjacent said opening, a sectional sealing ring surrounds ing said flange, stud bolts through the Walls of the housing and havinggecentrically lo- The sections can be clamped.

cated pins on their inner ends engaging slots in the sealing ring sections for adjusting the latter closely around the annular flange, and means for clamping the sealing ring sections when adjusted. in

3. In a grinding mill the combination of a housing, a grinding disk therein, a feed through an opening adjacent the hub of said disk, a sectional sealing ring surrounding said opening, means for clamping said ring sections and eccentric devices for adjusting said sections around said opening.

4. In a grinding mill the combination of a bearing, a grinding disk therein, a feed spout communicating with said housing through an opening adjacent the disk, an annular flange on said disk adjacent said opening, a sectional sealing ring surrounding said flange, and eccentrically adjustable pins engaging the sealing ring sections for adjusting the latter closely around the said 5. In a grinding mill, the combination with a base frame, longitudinally disposed shafts mounted thereon and opposed grinding disks on the inner adjacent ends of said shafts, one of said shafts being movabl longitudinally with its bearings, and a set 01 independently adjustable housings for said bearings simultaneously slidable with the shaft longitudinally of the base to permit said shaft and its disk to be moved longitudinally of the frame to bodily separate the disks.

6. The combination in an attrition mill of a base frame having standards thereon, journal boxes or housings mounted on said standards, hearings in said boxes, and axially alined runner-shafts journaled in said bearings; the boxes containing the bearings for spout communicating with said housing one of said shafts being slidably mounted on adjacent standards, and means for moving said slidable boxes bodily with the shaft to separate the runner-heads.

7. In an attrition mill, the combination of a base frame, standards on said frame, journal boxes or housings mounted on said standards, bearings in said boxes, and axially alined runner-shafts journaled in said bearings; one of said shafts being movable endwise with its bearings and the boxes containing the movable shaft bearings being slidably mounted on adjacent standards, to-

ge her with means for moving said slidable boxes bodily with the shaft j ournaled therein without changing the position of the bearings relatively to the boxesin which they are contained.

. 8. Ina grinding mill, a base frame having standards thereon, axially alined runnershafts mounted on said standards, one of said shafts being j ournaled in bearings movable longitudinally with the shaft, housings for saidbearings slidably mounted on adjawill &

. is journaled being movable longitudinally with the shaft, a rack on one of said movable boxes, and a shaft geared to said rack, whereby the movable boxes may be shifted bodily with the shaft to separate the runner-heads Without disturbing the grinding adjustment of said shaft in its bearings.

10. In a grindingmill the combination of a base, a housing, a pair of axially'alined shafts mounted in bearings at opposite sides of the housing and extending into the housing, grinding disks on the ends of said shafts within the housing, the inner bearings for one of said shafts being slidably mounted and the shaft being rotatably but normally longitudinally immovably journaled' in said bearing, said housing having anopening in its side next said bearing to permit the pro jection of the adjacent disk hub therethrough, and a cover for said opening attached to and movable with the said'slidable bearing and adapted to close said opening. when the parts are in grinding position, and

to inclose the housing when the bearing and shaft are moved outwardly.

11. In a grinding mill the combination of a base, a housing, a pair of axially alined shafts mounted on said base at opposite sides of the housing and extending into the housing, and grinding disks on the ends of said shafts within the housing, an inner bearing for one of said shafts slidably mounted on the base, ing an opening in its side next the said slidable bearing to permit the projection-of the adjacent disk hub therethrough when the and said housing hav shaft and hearing are moved outward, and a cover for said opening attached to and movable with the said adapted to close said opening when the parts are in rinding position.

12. n a grinding mill the combination 0 a base, a housing, axially alined shafts mounted on the base and extending into the housing, grinding disks on said shafts within the housing, slidable bearings for one of said shafts, said housing having an opening in its side next the adjacent slidable bearing to permit the projection of the disk hub therethrough, and 'a cover for said opening attached to and movable with said adjacent slidable bearing adapted to close said opening when the parts are in grinding'position.

13. In a grindin mill the combination of a housing, oppositely disposed grinding disks therein, a feed spout communicating slidable bearing and with said grinding disks through an opening in the housing adjacent the eye of one of the disks, a sectional sealing ring surrounding said opening, means for clamping the sealing ring sections in position around said opening, and eccentric devices for adjusting the ring sections to contract or expand the ring, substantially as described.

14. In a grinding mill the combination'of ,a housing, opposite grinding disks therein,

a spout communicating with said disks through an opening m the housing ad acent the eye of one of the disks, an annular flange on the latter disk adjacent said opening, a sectional sealing ring surrounding said flange, eccentric devices for'adjusting said sections to expand or contract the ring, and means for clamping the ring sections when adjusted.

In testimony that I claim the foregoing as my own, I affix my signature in presence of two witnesses.

SIMON SNYDER. lVitnesses:

JOHN P. MICHAEL, D. W'. BUFFINGTON. 

